Support of incremental mode in ConfigurationMetadataAnnotationProcessor

[frost13it]

The ConfigurationMetadataAnnotationProcessor should support incremental annotation processing.
At the moment (2.1.8.RELEASE and 2.2.0.M6) in a Gradle project with Kotlin and kapt the following warning is displayed on build:

w: [kapt] Incremental annotation processing requested, but support is disabled because the following processors are not incremental: org.springframework.boot.configurationprocessor.ConfigurationMetadataAnnotationProcessor (NON_INCREMENTAL).

There are many annotation processors that support incremental mode, some of them are listed here.

[wilkinsona]

Thanks for the suggestion. Unfortunately this isn't possible due to a limitation in Gradle. Please see #16603 (comment) for details.

[frost13it]

Thanks for response and sorry for my failure to find the similar issue.

[mattdkerr]

Is this now possible in Gradle 6.0?

[wilkinsona]

@mattdkerr Please don't make essentially the same comment on multiple issues, particularly when one is already marked as a duplicate of the other. It creates unnecessary noise for everyone watching the repository.